LJ-474 Refactor privacy request processing to never re-use sessions

[erosselli]

Closes LJ-474

Description Of Changes

Updated all graph_task code to use new sessions for querying the database rather than relying on self.resources.session. This is for the same reasons as explained in #5834

Steps to Confirm

1. Update your fides.toml to run DSR 3.0 by setting use_dsr_3_0 = true under [execution]
2. Create a System (or choose an existing one) and link an integration of your choosing to it (e.g Postgres )
3. Create a Dataset for that integration and link it to the integration
4. Run a DSR
5. Privacy Request should run OK
6. Change the credentials for the integration so that they are wrong (i.e integration will fail)
7. Run another DSR
8. Privacy Request should show in errored status as expected, with the Activity Timeline showing correctly
9. Update your fides.toml back to DSR 2.0 , and re-run steps 2-8

Pre-Merge Checklist

• Issue requirements met
• All CI pipelines succeeded
• CHANGELOG.md updated
  • Add a db-migration This indicates that a change includes a database migration label to the entry if your change includes a DB migration
  • Add a high-risk This issue suggests changes that have a high-probability of breaking existing code label to the entry if your change includes a high-risk change (i.e. potential for performance impact or unexpected regression) that should be flagged
• Followup issues:
  • Followup issues created (include link)
  • No followup issues
• Database migrations:
  • Ensure that your downrev is up to date with the latest revision on main
  • Ensure that your downgrade() migration is correct and works
    • If a downgrade migration is not possible for this change, please call this out in the PR description!
  • No migrations
• Documentation:
  • Documentation complete, PR opened in fidesdocs
  • Documentation issue created in fidesdocs
  • If there are any new client scopes created as part of the pull request, remember to update public-facing documentation that references our scope registry
  • No documentation updates required

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
fides-plus-nightly	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 11, 2025 0:24am
fides-privacy-center	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 11, 2025 0:24am

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.02%. Comparing base (728a36a) to head (5adac27).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5862   +/-   ##
=======================================
  Coverage   87.02%   87.02%           
=======================================
  Files         407      407           
  Lines       25125    25141   +16     
  Branches     2706     2706           
=======================================
+ Hits        21864    21880   +16     
  Misses       2678     2678           
  Partials      583      583           

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[cypress]

fides    Run #12652

Run Properties:   Passed #12652  •  79061445ae: LJ-474 Refactor privacy request processing to never re-use sessions (#5862)

Project	fides
Branch Review	main
Run status	Passed #12652
Run duration	00m 50s
Commit	79061445ae: LJ-474 Refactor privacy request processing to never re-use sessions (#5862)
Committer	erosselli
View all properties for this run ↗︎

---

Test results
Failures	0
Flaky	0
Pending	0
Skipped	0
Passing	5
View all changes introduced in this branch ↗︎